William Rooney (Irish: Liam Ó Ruanaidh; 29 September 1873 – 6 May 1901), also known as Fear na Muintire, was an Irish nationalist, journalist, poet and Gaelic revivalist. Along with Arthur Griffith and Denis Devereux he founded the Celtic Literary Society, and with Griffith founded the first Cumann na nGaedheal.